Authenticated SSRF via IPv4-mapped IPv6 validation bypass
Published Jun 26, 2026 · Updated Jun 26, 2026
SSRF in AutoGPT before 0.6.52 allows remote authenticated users to reach internal network services through SendWebRequestBlock. The IP-blocking helper in backend/backend/util/request.py compares mapped IPv6 addresses against IPv4 networks without normalizing them and omits CGNAT space. Low-privileged platform access and attacker-controlled DNS are sufficient to relay requests internally, while resulting data access or execution depends on the reachable service.
Summary
What happened
SSRF in AutoGPT before 0.6.52 allows remote authenticated users to reach internal network services through SendWebRequestBlock. The IP-blocking helper in backend/backend/util/request.py compares mapped IPv6 addresses against IPv4 networks without normalizing them and omits CGNAT space. Low-privileged platform access and attacker-controlled DNS are sufficient to relay requests internally, while resulting data access or execution depends on the reachable service.
The record
- CVE
- CVE-2026-56663
- Published
- Jun 26, 2026
- Updated
- Jun 26, 2026
- Vendor
- Significant Gravitas
- Product
- AutoGPT
- Classifications
- CWE-918, T1190
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Jun 26, 2026CVE publishedPublication date reported by the CVE source.
- Jun 26, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=< 0.6.52
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
- Vendor advisory IPv4-mapped IPv6 reproductionproof of concept · demonstrated
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
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Your stack
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